Mercedes-Benz ML320. Manual — part 700

Commercially available tools

Workshop equipment

DRAINING, EVACUATING AND REFILLING AIR CONDITIONING, CHECKING FUNCTION AND CHECKING FOR
LEAKS - AR83.30-P-1760GH

MODELS 163.113 /128 /136 /154 /157 /172 /174 /175 with CODE (580) Air conditioning or Tempmatic for
USA

Replace refrigerant compressor RPM sensor

Models 901-904

Not in model 163

AR83.55-D-
5320A

7

Set blower rotary
switch to maximum
blower setting

8

Check that refrigerant
flows free of bubbles

If the system is filled sufficiently, the refrigerant must flow

through the inspection glass (2) free of bubbles. A newly-
filled system may initially reveal bubbles. In this case, wait
for approx. 10 min. and check inspection glass again.
Does not reveal bubble-free flow ?

Check entire air conditioning circuit for leaks using leak
detector (3).

AR83.30-D-
1209-01A

Air conditioning system leak detector

*WE58.40-Z-
1002-20A

9

Determine air outlet
temperature

Switch blower rotary switch to stage "1".

Insert sensor of temperature measurement device (1) into the
air outlet of the center nozzles.
After running for a period of 5 min., the air outlet temperature
must not be less than 2°C and more than 12°C. After 5 min., at
the latest, the refrigerant compressor must also be connected
and disconnected.
If the refrigerant compressor is disconnected at below 2°C ?
Check evaporator temperature switch. If the air outlet
temperature is not achieved ?
Check the connection and disconnection of the refrigerant
compressor or the refrigerant pressure upstream and
downstream of the refrigerant compressor.

*WH58.30-Z-
1005-08A

10

Switch air conditioning
off and shut vehicle
engine off

Number

Designation

WH58.30-Z-1005-08A

Temperature measuring device

WE58.40-Z-1002-20A

Air conditioning leak detector

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me

Fig. 157: Checking Draining, Evacuating And Refilling Air Conditioning Function

Draining

Risk of explosion from welding or
soldering work on closed air conditioning
system. Risk of poisoning . Inhaling
overheated refrigerant vapors may be
toxic. Risk of injury from skin and eye
contact with liquid refrigerant.

Do not carry out any welding work on the
closed air conditioning system or in the
surrounding area. No smoking or open flames.
Wear eye protection and protective gloves.
Work only in well ventilated areas. Carry out
repair work on the air conditioning system
circuit only after the system has been
discharged.

AS83.00-Z-
0001-01A

1

Connect the connector (blue) (3) of the
filling unit (1) to the Schrader valve of
the high-pressure line and the connector
(red) (2) to the Schrader valve of the
suction line.

During all steps, the operating instructions

for the particular filling unit must be
followed.

*WE58.40-
Z-1002-22A

2 Discharge air conditioning system

3

Drain separated oil for refrigerant
compressor out of the inspection glass for
the filling unit and determine the quantity
exactly

Drained quantity must be replaced by fresh

oil for refrigerant compressor.

Evacuate

Clean air conditioning system and

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me

Air conditioning system

Workshop equipment

REMOVE/INSTALL DEFROSTER VENT FLAP ACTUATOR MOTOR FOR WINDSHIELD - AR83.30-P-2006GH

MODEL 163.113 /154 /174 #A as of 289565, 163.113 #X as of 754620, 163.128/157/175

4 evacuate

Filling

5

Supplement oil for refrigerant
compressor

The exact quantity determined when

drained must be used.

6 Fill air conditioning system

*BF83.30-P-
1001-01B

Testing

7

Inspect air conditioning system for leaks
with leak detector

*WE58.40-
Z-1002-20A

8

Risk of accident. Accidents may result if
the vehicle starts off unintentionally with
the engine running. Risk of injury from
bruises and burns if you hold your hand
near engine when it is started or when it
is running. Check function of air
conditioning

Secure vehicle to prevent it from moving.
Wear closed and snug-fitting work clothes.
Do not grasp hot or rotating parts.

Run engine at idle speed for about 4

minutes and check all the component
functions which are of relevance for proper
operation of the air conditioning system.

AS00.00-Z-
0005-01A

Number

Designation

Model Series 163

BF83.30-P-1001-01B Refrigerants

Filling quantity

g 750

Specifications for Operating Fluids

Sheet

BB00.40-P-0361-00A

WE58.40-Z-1002-20A

Air conditioning leak detector

WE58.40-Z-1002-22A

Air conditioning service station

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me

Fig. 158: Identifying Components Of Defroster Vent Flap Actuator Motor For Windshield

REMOVE/INSTALL FOOTWELL FLAP ACTUATOR MOTOR - AR83.30-P-2007GH

Remove/install

1

Remove cover below instrument
panel (left)

AR68.10-P-
1500GH

2.1

Remove electronic transmission
control (ETC) control module

Only on models fitted with automatic

transmission.

AR27.19-P-
1719GH

3

Disconnect interior and taillamp
wiring harness connector, cockpit
(X18)from bracket(1)

4

Remove screws (2)

5

Move bracket (1) downwards and
put to one side

6

Disconnect plug (3)

7

Remove screws (4) on defroster vent
flap actuator motor (M2/8) from
heater housing

8

Remove defroster vent flap actuator
motor (M2/8)

Installation: Adjust defroster vent flap

actuator motor (M2/8) to the 0 position
using STAR DIAGNOSIS.

9

Install in the reverse order

2001 Mercedes-Benz ML320

1998-2005 HVAC Climate Control - 163 Chassis

me